149 lines
4.0 KiB
Dart
149 lines
4.0 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:pdfx/pdfx.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:qhd_prevention/pages/my_appbar.dart';
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import 'package:qhd_prevention/customWidget/custom_button.dart';
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import 'package:dio/dio.dart';
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import 'package:qhd_prevention/tools/tools.dart';
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class RemoteFilePage extends StatefulWidget {
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final String fileUrl;
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final int countdownSeconds;
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const RemoteFilePage({
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Key? key,
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required this.fileUrl,
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this.countdownSeconds = 3,
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}) : super(key: key);
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@override
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_RemoteFilePageState createState() => _RemoteFilePageState();
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}
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class _RemoteFilePageState extends State<RemoteFilePage> {
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String? _localPath;
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bool _isLoading = true;
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bool _hasScrolledToBottom = false;
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bool _timerFinished = false;
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late int _secondsRemaining;
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Timer? _countdownTimer;
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late PdfControllerPinch _pdfController;
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int _totalPages = 0;
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@override
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void initState() {
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super.initState();
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_secondsRemaining = widget.countdownSeconds;
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_startCountdown();
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_downloadAndLoad();
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}
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Future<void> _downloadAndLoad() async {
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try {
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final url = widget.fileUrl;
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final filename = url.split('/').last;
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final dir = await getTemporaryDirectory();
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final filePath = '${dir.path}/$filename';
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final dio = Dio();
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final response = await dio.get<List<int>>(
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url,
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options: Options(responseType: ResponseType.bytes),
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);
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final file = File(filePath);
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await file.writeAsBytes(response.data!);
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// 加载 PDF 控制器
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_pdfController = PdfControllerPinch(
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document: PdfDocument.openFile(filePath),
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);
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setState(() {
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_localPath = filePath;
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_isLoading = false;
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});
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} catch (e) {
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// 下载或加载失败
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setState(() {
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_isLoading = false;
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});
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text('文件加载失败: $e')),
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);
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}
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}
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void _startCountdown() {
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_countdownTimer = Timer.periodic(const Duration(seconds: 1), (timer) {
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setState(() {
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if (_secondsRemaining > 1) {
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_secondsRemaining--;
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} else {
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_secondsRemaining = 0;
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_timerFinished = true;
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_countdownTimer?.cancel();
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}
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});
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});
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}
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@override
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void dispose() {
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_countdownTimer?.cancel();
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if (!_isLoading) {
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_pdfController.dispose();
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}
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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final isButtonEnabled = _timerFinished && _hasScrolledToBottom;
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return Scaffold(
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appBar: MyAppbar(title: '资料学习'),
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backgroundColor: Colors.white,
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body: SafeArea(
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child: Column(
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children: [
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Expanded(
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child: _isLoading
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? const Center(child: CircularProgressIndicator())
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: PdfViewPinch(
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controller: _pdfController,
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scrollDirection: Axis.vertical,
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onDocumentLoaded: (document) {
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setState(() {
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_totalPages = document.pagesCount;
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});
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},
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onPageChanged: (page) {
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if (page == _totalPages - 1) {
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setState(() => _hasScrolledToBottom = true);
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}
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},
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),
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),
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Padding(
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padding: const EdgeInsets.all(16),
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child: CustomButton(
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backgroundColor: isButtonEnabled ? Colors.blue : Colors.grey,
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text: isButtonEnabled
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? '我已学习完毕'
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: _secondsRemaining == 0 ? '我已学习完毕' : '（$_secondsRemaining s）我已学习完毕',
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onPressed: isButtonEnabled
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? () {
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// TODO: 完成回调
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Navigator.pop(context);
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}
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: null,
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),
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),
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],
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),
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),
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);
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}
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}
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